/*
 *
 * (c) Copyright Ascensio System Limited 2010-2017
 *
 * This program is freeware. You can redistribute it and/or modify it under the terms of the GNU 
 * General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html). 
 * In accordance with Section 7(a) of the GNU GPL its Section 15 shall be amended to the effect that 
 * Ascensio System SIA expressly excludes the warranty of non-infringement of any third-party rights.
 *
 * THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR
 * FITNESS FOR A PARTICULAR PURPOSE. For more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
 *
 * You can contact Ascensio System SIA by email at sales@onlyoffice.com
 *
 * The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display 
 * Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
 *
 * Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains 
 * relevant author attributions when distributing the software. If the display of the logo in its graphic 
 * form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE" 
 * in every copy of the program you distribute. 
 * Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
 *
*/


using System.Linq;
using System.Text.RegularExpressions;
using System.Web.Mvc;

namespace ASC.Api.Web.Help.Helpers
{
    public static class Highliter
    {
        private static readonly Regex Highlite=new Regex(@"\{([a-z0-9]+)\}", RegexOptions.Compiled|RegexOptions.IgnoreCase|RegexOptions.Singleline);

        public static MvcHtmlString HighliteParams(string address)
        {
            var replace = Highlite.Replace(address, "<span class=\"bracket\">{</span><span class=\"param-name\">$1</span><span class=\"bracket\">}</span>");
            return MvcHtmlString.Create(replace);
        }

        public static MvcHtmlString HighliteString(string toHighlite, string what)
        {
            if (string.IsNullOrEmpty(what) || string.IsNullOrEmpty(toHighlite))
                return MvcHtmlString.Create(toHighlite);

            var words = Regex.Split(what, @"\W+").Where(x => !string.IsNullOrEmpty(x));
            return
                MvcHtmlString.Create(Regex.Replace(toHighlite, "(" +string.Join("|",words.Select(x=>Regex.Escape(x)).ToArray()) + ")",
                                                   "<span class=\"search-result\">$1</span>", RegexOptions.IgnoreCase | RegexOptions.Singleline));
        }

        public static MvcHtmlString HighliteSearchString(string value)
        {
            return MvcHtmlString.Create(value);
        }
    }
}